Specifications

Channel Master Operation Manual
page 88 Teledyne RD Instruments
VF – Vertical Beam Blank after Transmit
Purpose Moves the start of the search away from the transducer head.
Format VFnnnn
Range nnnn = 5 to 9999 cm (328 feet)
Default VF0005
Recommended Setting. The default setting for this command is
recommended for most applications.
Description Set the VF command to start the search for the surface to some
distance after transmit to avoid adjacent structures or to allow
transmit recovery.
VP – Vertical Beam Number of Pings per Ensemble
Purpose Sets the number of pings per ensemble.
Format VPnn
Range nn = 0 to 99 pings
Default VP1
Recommended Setting. The default setting for this command is
recommended for most applications.
Description This is similar to the WP command. Unlike horizontal beam
pings, vertical beam pings contain multiple sub-pings. This
means vertical beam pings take longer, but produce higher
resolution and better averaged data than they otherwise would.
NOTE. IF VP = zero, the Channel Master does not collect vertical beam
data, and the VD command will have no effect (see “VD – Vertical Beam
Data Out,” page 87). No vertical beam data (Surface track amplitude,
surface track commands, and surface track status) will be included in the
output data.